US2982799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic conversion of hydrocarbons
Assignee: Shell USA Inc
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Filing: 1959-03-24
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Granted: 1961-05-02
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Expires: 1979-03-24
Abstract
No abstract record available.
Inventors
- 👤 Jan W Klinkenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:09
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/18; C07C2521/00; C07C2521/06; C07C2521/08; C07C2521/12; C07C2523/00; C07C2523/16; C07C2523/24; C07C2523/30; C07C2527/00; C07C2527/14; C07C2527/16; C07C2527/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PROCESS FOR THE SELECTIVE POLYMERIZATION OF ISOBUTYLENE WHICH COMPRISES CONTACTING A MIXTURE OF ISOBUTYLENE AND UNBRANCHED BUTYLENES WITH A HETEROPOLY ACID SUPPORTED ON A GEL AS CARRIER AT A TEMPERATURE OF FROM ABOUT 20* TO ABOUT 200* C. AND A LIQUID HOURLY SPACE VELOCITY OF FROM ABOUT 1 TO ABOUT 40 1./1. H., SAID GEL BEING PREDOMINANTLY SILICA AND HAVING AN ALKALI CONTENT LESS THAN 1 MILLIEQUIVALENT PER 100 GRAMS, AND SAID HETEROPOLY ACID BEING DERIVED FROM TUNGSTIC ACID AND BEING PRESENT IN A CONCENTRATION OF FROM ABOUT 0.5% TO ABOUT 8% BY WEIGHT, BASED ON THE TOTAL DRIED CATALYST.
Claim 2
Dependent Claim
101 words
A PROCESS FOR THE SELECTIVE POLYMERIZATION OF ISOBUTYLENE WHICH COMPRISES CONTACTING A MIXTURE OF ISOBUTYLENE AND UNBRANCHED BUTYLENES WITH A HETEROPOLY ACID SUPPORTED ON A GEL AS CARRIER AT A TEMPERATURE OF FROM ABOUT 20* TO ABOUT 200* C. AND A LIQUID HOURLY SPACE VELOCITY OF FROM ABOUT 1 TO ABOUT 40 1./1. H., SAID GEL BEING PREDOMINANTLY SILICA AND HAVING AN ALKALI CONTENT LESS THAN 1 MILLIEQUIVALENT PER 100 GRAMS, AND SAID HETEROPOLY ACID BEING DERIVED FROM TUNGSTIC ACID AND BEING PRESENT IN A CONCENTRATION OF FROM ABOUT 0.5% TO ABOUT 8% BY WEIGHT, BASED ON THE TOTAL DRIED CATALYST.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |